降低OFDM系统PAPR的改进SLM算法  

Improved SLM algorithm for PAPR reduction in OFDM system

作　　者：季策 祝雯靖 魏颖[2] 贾佃霞 JI Ce;ZHU Wenjing;WEI Ying;JIA Dianxia(School of Computer Science and Engineering,Northeastern University,Shenyang 110169,China;College of Information Science and Engineering,Northeastern University,Shenyang 110004,China)

机构地区：[1]东北大学计算机科学与工程学院,辽宁沈阳110169 [2]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《通信学报》2018年第4期152-158,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61673093;No.61370152);沈阳市科技计划基金资助项目(No.F16-205-1-01)~~

摘　　要：为了降低正交频分复用系统中SLM算法的峰均功率比,减少边带信息传输,提高频谱利用率,首先提出基于转移矩阵和混沌序列的TL-SLM算法。TL-SLM算法有效减少了边带信息的传输,但PAPR的降低幅度有限。因此,进一步提出基于旋转向量的改进TL-SLM算法,即TR-SLM算法,该算法通过旋转向量的引入,产生更多的时域备选信号,达到进一步降低PAPR的目的。性能分析表明,虽然TL-SLM算法和TR-SLM算法少量增加了系统的复杂度,但PAPR性能得到了有效改善,而且较大幅度地减少了边带信息的传输。In order to reduce the peak to average power ratio(PAPR)of the conventional selective mapping(SLM)algorithm,decrease the transmission of side-band information,and improve the spectral efficiency in the orthogonal frequency division multiplexing(OFDM)system,the TL-SLM algorithm based on the conversion matrix and the chaotic sequence was proposed firstly.Although the TL-SLM algorithm could effectively decrease the transmission of side-band information,the reduction of PAPR was limited.To solve this problem,an improved TL-SLM algorithm based on the rotation vector was proposed,which was the TR-SLM algorithm.TR-SLM algorithm introduced the rotation vector to generate more time-domain alternative signals to further reducing the PAPR.The performance analysis shows that although the TL-SLM algorithm and the TR-SLM algorithm increase the complexity a little,the PAPR performance is effectively improved and the transmission of side-band information is greatly reduced.

关 键 词：正交频分复用 转移矩阵 混沌序列 旋转向量 峰均功率比 

分 类 号：TN919.3[电子电信—通信与信息系统]